Verfahren und Vorrichtung zur Untersuchung der Verteilung schwebender Teilchen

摘要

On-line, real-time particle analyzing and counting apparatus operating continuously. The particles, suspended in a fluent medium flowing through a transparent chamber of pre-determined cross section, are scanned by a flying spot of minimum practical dimensions. A photodiode adjacent the face of the chamber opposite impingement of the spot is activated in accordance with interruption of the light transmitted through the flowing medium. Activation is proportional to the size and density of the particles and the output of the photodiode is translated into pulses which are measured and counted in accordance with their magnitude and frequency. The pulses are grouped within specified size ranges for convenience of counting.